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Moderate

Total Charge Graph

APPH12-YBNQE1

A student uses a computer simulation to learn about electrostatics. In the simulation the student can add electrons or remove electrons from a macroscopic object such as a plastic rod, a pith ball, or a metal sphere.

The simulation then allows the student to determine the net charge in coulombs on the object. The student creates a graph of net charge vs. number of electrons. Note: the graph is not drawn to scale.

What is the slope of this graph?

A

Between $0.00$ and $-0.99$

B

$-1.00$

C

$-9.0\times { 10 }^{ 9 }$

D

$-1.6\times { 10 }^{ -19 }$